diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..b35b2c2
Binary files /dev/null and b/.DS_Store differ
diff --git a/client/client.cpp b/client/client.cpp
index d490030..1139562 100644
--- a/client/client.cpp
+++ b/client/client.cpp
@@ -18,7 +18,8 @@
 ///////////////////////////////////////////////////////////////////////////////
 
 enum commands {
-	SEND = 1,
+	LOGIN = 1,
+	SEND,
 	LIST,
 	READ,
 	DEL,
@@ -108,7 +109,7 @@ int main(int argc, char **argv)
 	*/
 
 	do {
-		printf("Please specify a command (SEND, LIST, READ, DEL, QUIT): ");
+		printf("Please specify a command (SEND, LIST, READ, DEL, QUIT, LOGIN): ");
 		if (fgets(buffer, BUF - 1, stdin) != NULL)
 		{
 			size = strlen(buffer);
@@ -124,7 +125,8 @@ int main(int argc, char **argv)
 			}
 
 			enum commands cmd;
-			if (strcmp(buffer, "SEND") == 0) cmd = SEND;
+			if (strcmp(buffer, "LOGIN") == 0) cmd = LOGIN;
+			else if (strcmp(buffer, "SEND") == 0) cmd = SEND;
 			else if (strcmp(buffer, "LIST") == 0) cmd = LIST;
 			else if (strcmp(buffer, "READ") == 0) cmd = READ;
 			else if (strcmp(buffer, "DEL") == 0) cmd = DEL;
@@ -133,6 +135,15 @@ int main(int argc, char **argv)
 			char username[BUF], msgNum[10];
 
 			switch (cmd) {
+			case LOGIN: 
+				char ldapUsername[BUF], ldapPassword[BUF];
+    			printf("LDAP Username: ");
+    			fgets(ldapUsername, BUF - 1, stdin);
+    			printf("Password: ");
+    			fgets(ldapPassword, BUF - 1, stdin);
+    			snprintf(buffer, sizeof(buffer), "LOGIN\n%s%s", ldapUsername, ldapPassword);
+    			break;
+
 			case SEND:
 				char sender[BUF], receiver[BUF], subject[81], message[BUF * 10];
 				printf("Sender: ");
diff --git a/server/server.cpp b/server/server.cpp
index 175cbdc..24f6a18 100644
--- a/server/server.cpp
+++ b/server/server.cpp
@@ -3,6 +3,10 @@
 
 #include "mail.h"
 
+
+#include <ldap.h>
+
+
 #include <algorithm>
 #include <ranges>
 #include <cstddef>
@@ -32,6 +36,9 @@
 #include <arpa/inet.h>
 #include <signal.h>
 #include <openssl/sha.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
 
 #define BUF 1024
 
@@ -385,8 +392,46 @@ inline void exiting()
 
 std::string cmdLOGIN(std::vector<std::string>& received)
 {
-	// code
-	return "";
+	if (received.size() < 3) {
+        return "ERR\n";
+    }
+
+	const char* ldapUri = "ldap://ldap.technikum-wien.at:389";
+    const int ldapVersion = LDAP_VERSION3;
+    LDAP* ldapHandle;
+    int rc = ldap_initialize(&ldapHandle, ldapUri);
+    if (rc != LDAP_SUCCESS) {
+        return "ERR\n";
+    }
+
+	rc = ldap_set_option(ldapHandle, LDAP_OPT_PROTOCOL_VERSION, &ldapVersion);
+    if (rc != LDAP_OPT_SUCCESS) {
+        ldap_unbind_ext_s(ldapHandle, NULL, NULL);
+        return "ERR\n"; 
+    }
+
+	rc = ldap_start_tls_s(ldapHandle, NULL, NULL);
+    if (rc != LDAP_SUCCESS) {
+        ldap_unbind_ext_s(ldapHandle, NULL, NULL);
+        return "ERR\n";
+    }
+
+	std::string ldapBindUser = "uid=" + received[1] + ",ou=people,dc=technikum-wien,dc=at";
+    std::string ldapBindPassword = received[2];
+
+	BerValue bindCredentials;
+    bindCredentials.bv_val = (char*)ldapBindPassword.c_str();
+    bindCredentials.bv_len = ldapBindPassword.length();
+    rc = ldap_sasl_bind_s(ldapHandle, ldapBindUser.c_str(), LDAP_SASL_SIMPLE, &bindCredentials, NULL, NULL, NULL);
+    if (rc != LDAP_SUCCESS) {
+        ldap_unbind_ext_s(ldapHandle, NULL, NULL);
+        return "ERR\n"; 
+    }
+	
+
+	ldap_unbind_ext_s(ldapHandle, NULL, NULL);
+	
+	return "OK\n";
 }	
 
 std::string cmdSEND(std::vector<std::string>& received)